trenchless method in japan - gcus | global center for...

TrenchlessNew Installation & Rehabilitation

in Japan

Contents1. Why trenchless?

-For New Installation

2. What is Micro Tunneling?

3. What is Shield Tunneling with segment lining?

-For Rehab

4. What is Cured in Place Pipe(CIPP)?

5. What is Spirally Wound Pipe(SWP)

Why Trenchless? Less disturbing to society

No need relocation of other utility lines

Possible to cross rivers, railways and highways

What is Micro Tunneling?

Drive Shaft

Installation of Boring machine

Source: Japan Microtunneling Association

Drive Shaft

Pushing by jacking(red one)

Installation Jacking pipe

Source: Japan Microtunneling Association

7

Pipe

Thrust ring

Jacking rig

Exit eye

Drive Shaft

Source: Japan Microtunneling Association

Reception Shaft and completion

Backfill Grouting

Reception Shaft

Source: Japan Microtunneling Association

Source: Environmental Planning Bureau, Yokohama City

Diameter 4000mm (micro tunneling ) in Yokohama City

Jacking Pipe

(external diameter 4600mm)

Tunnel Boring Machine

Construction Period: From 2009 to 2011

Length: 320m

Source: Environmental Planning Bureau, Yokohama City

Diameter 4000mm (micro tunneling ) in Yokohama City

Jacking at drive shaft Inside

What is Micro Tunneling?

Reception

Shaft

Drive

Shaft

Vietnamese Trainees, Japan, February 26 to March 10, 2012

LectureSite Visit of

Micro tunneling Method

Source: Sewerage Business Management Centre

Training on Micro Tunneling

Site Visit of

Micro tunneling Method

What is Shield Tunneling ?

Source: Environmental Planning Bureau, Yokohama City

Shield Tunneling in Yokohama City

Tunnel Boring MachineDrive Shaft

Source: Environmental Planning Bureau, Yokohama City

Shield Tunneling in Yokohama City

First Cut Erected Segments

Source: Environmental Planning Bureau, Yokohama City

Shield Tunneling in Yokohama City

Secondary Lining Finished Pipeline

Damaged Pipe by Corrosion

18

What is CIPP ?inversion

pressure generator Boiler Deodorization

plug Liner end restrained

Section of CIPP

Liner(resin)

The damaged host Pipe

Installing Liner Inverting Liner

Before Rehabilitation After Rehabilitation

What is SWP?power supply profiled plastic strip

Rehabilitated Pipeline

Installation of SWP

Rectangular Shape Horseshoe Shape

Summary Time has come for trenchless to cope with heavy traffic

& urbanization

For new sewer installation, micro tunneling & shield tunneling with segment lining are recommended.

For rehabilitation, CIPP & SWP are options

Technology is transferred from Japan

Thank you for your attention!

Japan Sewage Works Association

Japan Global Center for Urban Sanitation